The whole Grand Theft Auto series and all games made in its formula (like Saints Row 2, and a few games made about rappers, like 50 cent). I don't even give a shit how the gameplay is, these games glorify those damned gangsters and their backwards, barbaric, and destructive culture. They are wretched villains and terrorists in the heart of all our cities, and instead of hunting them down and killing them all we're making games about them. Not to mention all the kind of logical hellfire they bring down on the industry, giving anti-video game psychos ammunition.
Call of Duty, Modern Warfare, and similar games. These I don't hate nearly as much as the afforementioned GTA series, but I still consider these a blight on our beloved gaming industry. They're all so terribly and oppressively bland, always re-hashing the same themes in settings in the same detestable grayish-brown color palette. These games are the antitheses of creativity, individuality, and escapism from our drab, dingy, depressing world. What's more, they sell like hot cakes, spreading the plague to more and more games. These often bring down the wrath of Fox news and other third-rate journalists, but unlike the GTA games, they at least glorify someone worth glorfying.
Yeah, and pretty much any game that focuses on online multiplayer. I think you know why.